\name{qcssa}
\docType{data}
\alias{qcssa}
\title{Topo: Queen Charlotte Sound Survey Strata}
\description{
  PolySet of polygons describing the survey strata for the Queen
  Charlotte Sound synoptic groundfish survey.
}
\usage{data(qcssa)}
\format{
  Data frame comprising 5 columns: \cr
    \code{PID.....}{primary polygon ID} \cr
    \code{POS.....}{position of each vertex within a given polygon} \cr
    \code{X.......}{longitude coordinates} \cr
    \code{Y.......}{latitude coordinates} \cr
    \code{strat...}{stratum descriptor}
}
\source{
  Polygon data in use at Fisheries and Oceans Canada (Pacific region)
  for delimiting 2 areal strata for the Queen Charlotte Sound synoptic
  groundfish survey (Stanley \emph{et al.} 2004). The two areal strata divide
  the central BC coast region into a northern and southern
  component. Four depth zones (50--125 m, 125--200 m, 200--330 m, 330--500 m)
  are used in the survey but not delimited in this PolySet.
}
\references{
  Stanley, R.D., Starr, P., Olsen, N. and Haigh, R. (2004) 
  Summary of results of the 2003 Queen Charlotte Sound bottom trawl survey. 
  \emph{Canadian Science Advisory Secretariat, Research Document} \bold{2004/028}, 50 pp. \cr
  \url{http://www.dfo-mpo.gc.ca/csas/CSAS/publications/ResDocs-DocRech/2004/2004_028_E.htm}
}
\examples{
\dontrun{
local(envir=.PBSdataEnv,expr={
pbsfun=function(){
  opar = par(no.readonly=TRUE); on.exit(par(opar))
  if (!require(PBSmapping, quietly=TRUE)) stop("`PBSmapping` package is required")
  data(nepacLL,qcssa,envir=.PBSdataEnv)
  plotMap(nepacLL,xlim=c(-132.8,-126.9),ylim=c(50.5,52.9),border="grey")
  pdata=attributes(qcssa)$PolyData
  addPolys(qcssa,polyProps=pdata); addPolys(nepacLL,border="grey")
  addPolys(qcssa,border="black");  addLabels(pdata,cex=1.2)
  box(); invisible() }
pbsfun()
})
}
}
\seealso{
  \code{\link{ltsa}}, \code{\link{wcvisa}}
}
\keyword{datasets}
